GarageBand: Editing with the flex and crop pointers

When editing real instrument regions in the editor, you can use either the crop pointer or the flex pointer.

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When you move the pointer over the upper half of a region, the pointer becomes a Flex pointer that you can use to edit the timing of the region. When you move the pointer over the lower half of a region, the pointer becomes a crop pointer that you can use to crop or trim the region.